That holster is a strange one, it takes a while to get used to clipping it off and on, it really needs to be on the side where you can look down at it, at least until your used to it. I HATED it my first game, I could never get it back properly the first time and even dropped it trying to click it back in. The more I use it the more I love it though, super handy and easier than lifting the gun up about 2 foot to pull out of a traditional style holster.
The bottom pic you posted if you angle it slightly so the suppressor is facing towards the right (as in the pic) a couple of clicks, that's how I run mine, not being too tall it has hit the floor as I favour going to me right knee often (its worse outdoors with roots and uneven ground, spent ages getting mud out of it once haha)